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Methods and systems for scheduling work

  • US 6,684,117 B2
  • Filed: 05/02/2003
  • Issued: 01/27/2004
  • Est. Priority Date: 03/31/2000
  • Status: Expired due to Fees
First Claim
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1. A system for scheduling operations in a steel mill, comprising:

  • means for reading all the orders that must be produced in a certain period of time and for creating the necessary number of slabs to satisfy the orders;

    means for reading all the virtual slabs to be produced and their due dates as hot coils, and for generating an ideal rolling sequence of slabs;

    means for reading an ideal rolling sequence of slabs and for generating a set of heats to be produced;

    means for reading the real slabs to be produced, for generating a plurality of hot coil schedules, and for writing hot coil schedules into a hot coil schedule memory;

    means for reading a plurality of solutions from the hot coil schedule memory, for extracting common parts from the plurality of solutions, and for using the extracted parts as an initial partial solution for a hot strip mill sequencing algorithm.

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